a, CHAPTER II, SECTION 1 lo, 000 15,000 14,000 13,000 12,000 11,000 10,000 9, 000 8, 000 7 , 000 | a po| 6, 000 5, 000 4,000 3,000 2,000 1,000 MAR APR MAY JUN JUL AUG SEP OCT NOV DEC JAN FEB Na 1955 /\— 1956 Figure 2-2. Home Office Engineering Man-Hours Page 2-3